Improvement in steam-radiators



A. A GRIFF'INIL Steam-Radiators. N0.l55,`795 Patented 0ct,13,1874.

THE GRAPHIC C0. PHOTO'LITHBSA l PARK LCSNX.

UNITED STATES PATENT OFFICE.,

ABNER A. GRIFFING, OF JERSEY CITY, NEW JERSEY.

IMPROVEMENT IN sTEAM-RAmAToizs.

Specification forming part of Letters Patent No. l 55,795, dated October 13, 1874 application len July 9, 1874.

To all whom it may concern:

Be it known. that I, ABNEE A. G RIEEING, of Jersey City, New Jersey, have invented certain Improvements in Steam-Radiators, of

whichthe following isa specification:

My invention relates to steam-radiators for heating purposes; and consists of a return bend or U pipe, the legs ot' which are joined at their ends to a circular disk, which constitutes the plug for the opening in the radiatorbase, to which the U pipe is connected.

Double pipes have been frequently made in one piece oi' metal heretofore, but they have always been `foined to the radiator-base by a tubular neck, and the separation of thepassages has been usually effected by a partition or diaphragm in the neck.

By my invention each leg of the return bend or U pipe has a direct and independent communication with the steam chest or base, so that there isno interference with the steam Vcirculation by a conilict of currents, and no The drawings embrace--Figure 1, an elevation of a system of my radiators attached to a base; and Fig. 2, a transverse vertical section on line Fig. l, through the base (shown partly broken away) and one of the U tubes, the other U tubes being shown in elevation on opposite sides.

The radiator-base or steam-chest A is tapped for each return bend or U pipe b, and the apertures closed by the plug c. .The legs of each U pipe terlninate in the plug, the plug and pipe being cast in one piece of metal. There are, therefore, two vertical passages, d and e, each extending through the plug, and thus having direct and independent connection with the steam-chest. These two passages coincide with the ends of the curved passage f at the upper extremity of the radiator, thus providing for the circulation of currents of steam up one passage and down the other.

l claim as my invention- A return bend or U pipe, in combination with a circular disk, having two parallel apertures coinciding with the legs of the pipe, all cast in one piece of metal, substantially as shown, and for the purpose set forth.

ABNER A. GRIFFING.

Witnesses: l

A sA FARE, E. H. WILLIAMS. 

